HDR Brachytherapy vs SABR in Early-intermediate Prostate Cancer
Biochemical Relapse Free Survival, Complications Rates (Erectile Dysfunction, GI, GU Complications)
About this trial
This is an interventional treatment trial for Biochemical Relapse Free Survival focused on measuring brachytherapy, stereotactic ablative radiotherapy, survival, complications
Eligibility Criteria
Inclusion Criteria:
- WHO performance status of 0-2,
- histologically confirmed prostate adenocarcinoma: Gleason score - 6-7 (4+3), clinical stage T1c-T2c, N0, M0
- T and N stage determined by clinical examinations, MRI and/or PET-CT with PSMA
- PSA below 20 ng/ml within the last 30 days
- international prostate index score (IPSS) below 16
- medically fit to spinal anesthesia
- prostate volume below 110 cm³
- maximal urinary rate above 9 ml/sec, residual urine volume below 30ml,
- in the case of previous transurethral resection interval of at least 9 months after procedure.
Exclusion Criteria:
- stage T3-T4,
- PSA > 20 ng/ml,
- clinically detected lymph node or distant metastases,
- previous pelvic irradiation,
- rectal surgery.
Sites / Locations
- Sergey NovikovRecruiting
Arms of the Study
Arm 1
Arm 2
Active Comparator
Experimental
High dose rate brachytherapy
Stereotactic ablative radiotherapy
After spinal anesthesia steel or plastic needle placement performed under TRUS guidance. Pre- and post-insertion ultrasound based planning is obligatory in all cases. Two fractions of 13Gy are delivered with 2 separate implantations and 2-3 weeks interval. The CTV was defined as the prostate capsule with 1mm (low-risk) - 3 mm (intermediate risk) expansion plus proximal 1/3 of seminal vesicles. The PTV was equal to CTV. The rectum, bladder and urethra are contoured as organs at risk. The dosimetry plan objectives are the following: prostate D90 - above 104% and V100% - above 92%; urethra D10 < 110% , rectum D2cc<75% (below 75Gy EQD2).
Before SBRT three fiducial markers are obligatory inserted into the prostate.Planning MRI on diagnostic table with subsequent fusing with simulation CT is obligatory. CTV to planning target volume (PTV) expansion was 3-5 mm in all direction except posteriorly (in the direction of the rectum) where it is 1-3 mm. Dose must be delivered as 5 fraction of 7.25Gy. V100% for PTV ≥ 95%. Main dose constraints are as follows: D 2cm³ ≤ 36Gy for rectum (below 75Gy EQD2)., V 37.5 Gy <5 cm³ for bladder, V 20 Gy <10 cm³ for femoral heads. Androgen deprivation therapy is not permitted. All treatments must be performed on conventional linear accelerators with cone beam CT guidance before each fraction, intrafractional motion monitoring is optional.